Giáo án Tiếng Anh 8 unit 16: Inventions

Giáo án Tiếng anh lớp Unit 16 : INVENTIONS + Lesson : Getting started & Listen and Read + Lesson : Speak + Listen + Lesson : Read + Lesson : Write + Lesson : Language Focus Period 98 : Unit 16 - INVENTIONS – Lesson – Getting started / Listen and Read – Page 147-149 • Objectives : By the end of the lesson, students will be able to introduce the topic of the unit “Inventions”, and read a text about “a chocolate factory” to understand main ideas and details • Materials : Magnified copies of pictures from the textbook, posters, cassette recorder • Procedure Timin g 5’ Contents Teacher’s and students’activities I )Warmer : -T explains how to -Matching -SS work in groups and match Groupwork these stages in the development of *Getting Started / P 147 paper with the correct pictures Pictures a-e -T corrects Answer Key : 14’ A.b B.c C.e II ) Pre reading (Stage) : D.a E.d -T elicits .Pre teach -cacao bean (n) : hạt ca cao -SS guess (Situation) -T models -manufacturing process (n) : Quy trình sản xuất -SS repeat chorally first, then (Translation) individually -(to) crush : nghiền nát (Situation) -T puts the words on the board -(to) liquify : làm thành chát lỏng, cho thành nước -T (Explanation) pronunciation -Vanilla (n) : va-ni -(to) pour : đổ (Translation) (Mime) checks meaning and -mold (n) : khuôn (Situation) -conveyor belt (n) : băng truyền (tải) (Translation) (papyrus : cói, giấy cói / woodpulp : bột gỗ / papermaking : làm giấy / prisoner : tù nhân / to grind – ground-ground : xay nhỏ / to roll : cán) *Ex : -T gives two examples .The beans are washed .The first papermaking machine was invented in the late 1700s by a Frenchman *Present simple in passive : Am/is/are + P.P -T introduces the structure *Past simple in passive : was / were + P.P -T sets the scene -How many people are there in the dialogue ? Who are they ? T asks –Ss answer =>Mr Roberts, Tim, Sam, Mrs Allen -T introduces the situation *Sô cô la loại bánh nhiều người ưa thích Các em có biết thành phần để làm sô cô la gồm cách làm không ? *Tim Jones, người bạn Mỹ qua thư Hoa thăm nhà máy sản xuất sô cô la với bạn lớp cô giáo mình, cô Allen Ông Roberts, quản đốc (foreman ) nhà máy dẫn họ thăm quan Listen and Read / 147-148 *Open Prediction Để sản xuất sô cô la, cần nguyên liệu -SS guess ? 16’ III ) While reading (Stage) : -SS read the dialogue and check *Matching their prediction .Groupwork -T gets SS to read the dialogue / P.149 Answer key : and the task in groups a)E the beans are cleaned before being cooked -Ss go to the board to write their b)D Mr Robert thought Tim and Sam were going to touch answers the button -T corrects c)C After cooking, the cacao beans smell like chocolate d)F Sugar is one of the ingredients in chocolate e)B Mrs Allen warned Sam to leave some chocolate for others f)A A sample of chocolate is given after visitors have toured -T presses the tape the factory -SS listen with book-open Listen and Read / P.148 8’ IV ) Post reading (Stage) : *Ordering / Groupwork -SS practice in pairs -T gets students to order the sentences in groups of four 1)The shells are removed -Ss go to the board to write 2)The beans are washed, weighed and cooked -T gives feedback 3)The mixture is ground, rolled and poured into the molds 4)Cocoa(bột, nước, màu cacao) butter, sugar, vanilla and milk are added Answer key : 2-1-4-3 2’ V )Homework : -T says and writes “Homework” -Learn vocabulary on C.B -Do exercise 1-2 / P 96 -Prepare “Speak+Listen” / P.149-150 -SS copy Period 99 : Unit 16 - INVENTIONS – Lesson – Speak + Listen – Page 149-150 • Objectives : By the end of the lesson, students will be able talk one another about the famous inventions in daily life / listen to “the paper making process” • Materials : Posters, cassette recorder, magnified copies of pictures from the textbook • Procedure Timin g 5’ Contents Teacher’s and students’activities -T gives the topic I )Warmer : -Network / Groupwork -T divides the class into two groups -SS go to C.B to write.(one student-one word) Inventions -In two minutes, the group write more correct words are winners 8’ II ) Pre speaking : Pre teach -T elicits -reinforced concrete : bê tông cốt thép (Translation) -SS guess -loudspeaker (n) : loa phóng -T models (Visual) -helicopter (n) máy bay trực thăng (lên thẳng) -SS repeat chorally first, then (Explanation) individually -smooth (v)(adj) : làm cho nhẳn, trơn (Situation) -T puts the words on the board -(to) drain : làm nước -T -pulp vat (n) : chum bột giấy (Situation) (Translation) -roller (n) : / trục lăn checks meaning pronunciation (Visual) (papermaking machine : máy làm giấy / facsimile : máy fax / microphone : micrô / x-ray : máy cụp Xquang / printing press : máy in / optical fiber : sợi quang) *Trong học hôm học phát -T sets the scene minh tiếng sử dụng đời sống hàng ngày -Gapfill -SS fill in the gaps .Pairwork A : When was the facsimile invented ? B : It was invented in 1843 A : Who was it invented by ? -T gives Feedback and 7’ B : It was invented by Alexander Bain III) Controlled Practice : Grids / P.150-156 -T models -SS repeat chorally - Group : printing press / Bicycle -SS practice in pairs - Group : Facsimile / Sewing machine -T divides the class into - Group : Reinforced concrete / microphone groups - Group : X-ray / Loud speaker - Group : Helicopter / color TV - Group : Optical fiber / Laser *Transformation -SS complete the table .Groupwork Ex : The facsimile was invented by Alexander Bain in 1843 Answer key : Printing press was invented by Friedrich Koenig in 1810 -SS report the information they have got .The bicycle was invented by Karl D Sauerbronn in 1816 .The sewing machine was invented by Elias Howe in 1845 .The Reinforced concrete was invented by F.J Monier in 1849 .The Microphone was invented by D.E Hughes in 1878 .The X-ray wsa invented by Wilhelm Konarad in 1895 .The Loudspeaker was invented by C.W Rice in 1924 .The helicopter was invented by Igor Sikorsky in 1939 .The color TV was invented by Peter Carl Goldmark in 1950 .The optical fiber was invented by Gordon Gould in 1958 5’ IV)Free Practice (Production) : -Guessing game -SS each choose one invention -One student go to the board -The Topic : Inventions 6’ other SS ask questions until he/ske answer “Yes” -T sets the scene *Pre Listening : Trong tiết học trước học làm sô cô la Trong học hôm học cách làm giấy -SS order the sentences -Ordering.(prediction) / P.150-151 Yes-no (guess) 6’ *While listening : -T presses the tape Answer key : c-d-a-e-g-f-b *Listen / P.150 *Gapfill -Ss listen and check their predictions -SS listen and fill in the gaps .Individuals Answer key : / P.150 -T gives feedback a.simple 2.same 3.two hundred 4.left 5.rollers *Tapescript : “Papermaking is a simple process The procedure is almost the same as it was 200 years ago Look closely at this picture of an old paper making machine On the left is the pulp vat Paper pulp was placed in the vat and mixed with a lot of water The water was then drained and the pulp fibers were poured out of the vat and onto a conveyor belt The conveyor belt took them under the rollers There were quite a lot of rollers as you can see These rollers smoothed the fibers and pressed them dry The finished paper was then put on a roll at the end You can see the roll of paper at the far right of the picture.” * Post Listening : 6’ -SS retell how to make paper in -Retell English or Vietnamese Paper making 2’ V )Homework : -T says and writes “Homework” -Learn vocabulary on C.B - Prepare “Read” / P.151-152 -SS copy Tuần 34 Period 100 : Unit 16 - INVENTIONS– Lesson 3– Read – Page 151-152 • Objectives : By the end of the lesson, students will be able to read a poem about “inventions” to understand main ideas and details • Materials : Posters • Procedure Timin g 5’ Contents Teacher’s and students’activities -T gives the topic I )Warmer : -Hangman -T divides the class into two Groupwork groups Topic : Đây phương tiện thông tin -SS guess one letter each time liên lạc -The group ( find out the word ) - - - - - - - - - = telephone are winners (9 letters) 14’ II ) Pre reading : -T elicits .Pre teach -SS guess -microwave (n) : vi sóng (Translation) -T models -toaster (n) : máy nướng bánh mì (Explanation) -SS repeat chorally first, then -vacuum (n) : máy hút bụi (Situation) individually -hairdryer (n) máy sấy tóc (visual) -dishwasher (n) : máy rửa bát (Situation) -air conditioner (n) : máy điều hòa nhiệt độ -T puts the words on the board -T checks meaning pronunciation ( Explanation) (up-to-date (a) : đại, hợp thời trang / instrument : dụng cụ / appliance : thiết bị, dụng cụ) *Trong học hôm học -T sets the scene phát minh cho sống đại gia -SS guess đình -SS go to the board to write -Matching.( Predictions) and .Groupwork / P.152 Heading : tiêu đề, đề mục nhỏ Answer key : 15’ - Verse : b (câu/bài/khổ thơ) - Verse : c - Verse : a III ) While reading : -SS read the text and check their predictions *Gapfill -SS read the text again and fill in Individuals the gaps Answer key / P.152 1.vacuum 9’ 2.telephone 4.microwave IV ) Post reading : -SS go to c.b to write 3.dishwasher 5.hairdryer -Guessing Game Topic : Inventions 6.toaster -T gives Feedback -T calls a certain student to go to the board -T gives him “a name of invention” -The other SS ask Yes-no 2’ V )Homework : question until he answers “yes” -T says and writes “Homework” -Learn vocabulary on C.B -Prepare “Write” / P 152-153 -SS copy Period 101 : Unit 16 - INVENTIONS– Lesson – Write – Page 152-153 • Objectives : By the end of the lesson, students will be able to grasp papermaking process and describe how cocoa beans are processed • Materials : Posters, magnified copies of pictures from the textbook • Procedure Timin g 5’ Contents Teacher’s and students’activities I )Warmer : -T explains how to -Matching.(Sequence markers) Groupwork 15’ -SS work in groups and match the First a sau words with Next b meanings Then c cuối After this d Finally e sau điều (việc) their correct -T corrects Answer key : 1b 2d 3a 4e 5.c II ) Pre writing : -T elicits .Pre teach -SS guess -log (n) : gỗ khúc (Situation) -T models -chip (n) : lát mỏng (Situation) -SS repeat chorally first, then -(to) flatten : dát mỏng, làm cho bằng, phẳng (Mime) individually -(to) refine : lọc (trong), tinh chế (Explanation) -T puts the words on the board -(to) ferment : lên men, men -T -(to) shell : bóc / lột vỏ (Situation) (Mime) checks meaning and pronunciation -liquor (n ): rượu, nước luộc (thức ăn)(Explanation) (flavor (n) : mùi thơm, vị ngon, hương vị / powder (n) : bột, bụi / to crush : nghiền nát) -T sets the scene *Trong học hôm học quy trình làm giấy miêu tả quy trình làm sô cô la -SS work in groups and fill in the *Quy trình làm giấy gaps -Gapfill .Groupwork / P.152 -SS go to C.B to write their answers Answer key : 1.first 15’ 2.then 4.after this III ) While writing : 3.next -T corrects 5.Then 6.finally -T introduces *Qua hoạt động vừa luyện tập, biết bước quy trình làm giấy *Bây em nhìn vào tranh miêu tả quy trình chế biến ca cao xếp chúng theo thứ tự -SS put these pictures in the / P.153 Ordering .Individuals correct order -T gives Feedback Answer key : 6-2-4-1-5-3 *Bây em dùng từ liên tiếp phần Write để xếp câu theo thứ tự tranh hồn thành đoạn văn miêu tả quy trình làm sô cô la -Write-it-up -SS write individually .Individuals Suggested writing : -T goes around to help some SS d)First, the fruit harvest is fermented for three to nine days to kill the beans and turn them brown a)Then the beans are dried in the sun e)Next the beans are cleared in special machines c)After this, the beans (they) roasted to bring out the chocolate flavor b)Then they are shelled and ground to produce chocolate liquor f)Finally, the liquor is made into chocolate candy 8’ or cocoa powder IV ) Post writing : -SS compare their assignments with a partner’s *Sharing and Comparing * Or Exhibition -SS change their assignments and correct “mistakes” -T puts “ sentences which contain mistakes on C.B 2’ V )Homework : -T and SS correct -T says and writes “Homework” -Learn vocabulary on C.B -Rewrite the process completely -Prepare “Language Focus” / P 154-155 -SS copy Period 102 : Unit 16 - INVENTIONS – Lesson – Language Focus - Page 154-155 • Objectives : By the end of the lesson, students will be able to use Passive Forms and Sequence Markers • Materials : Posters, Magnified copies of pictures from the textbook • Procedure Timing 5’ Contents Teacher’s and students’activities -T divides the class into two -Network groups I )Warmer : Groupwork -SS go to C.B to write.(one Passive forms student-one form) -Or Grids (28’) Draw Win Run Sell Bring II )Passive forms : 5’ Drew Won Ran Sold Brought drawn Won Run Sold Brought 2.com.Ltd 3.due to more correct forms are winners -SS match the words (phrases) with -Matching /.Groupwork 1.run a business -In two minutes, the group write their meanings a.bởi b.quản lý, điều hành doanh nghiệp -T gives feedback c.công ty trách nhiệm hữu hạn 4.bran d.cối giả 5.mortar e.hạt gạo 6.winnow f.Kỹ thuật chép không dùng mực ướt 7.rice grain g.sảy thóc, quạt trấu 8.xerography h.cám (husk : xay, bóc võ / mill : cối xay, nhà máy xay / ballpoint pen : bút bi, bút nguyên tử / thresh : đập) Answer key : 1b 2c 3a 4h 5d 6g 7e 8f Ex : Miss Lien wrote the letter 8’ ->The letter was written by Miss Lien S+V+O -T gives an example -T reviews the form -T explains S + be + P.P + by + O  Simple present : am / is / are + P.P -T sets the scene  Simple past : was / were + P.P -T runs through vocabulary *Transformation / / P.154 Answer key : -SS the exercise individually a.The document was typed by Mrs Quyen -Feedback b.The computer was repaired by Mr Nhan -SS go to the board to write their c.The picture was drawn by Ba answers d.The lights was turned off by Hoa -T corrects e.The cake was baked by Lan / P.154 Active or Passive ? Sentence race 7’ Answer key : a.was awarded d.was run / was sold b.won c.run e.was closed *Bây em làm tập cuối thể bị động -T sets the scene and explains Đặt câu hỏi cho phần thông tin gạch chân Trước tiên 8’ em đọc câu xem phần gạch chân đề cập đến thông tin ?  The zipper maize ->what ?  In the 16th century, in 1884 ->when ?  By Lewis Waterman ->who ?  In Hungary ->where ?  In copying machines ->which ? / P.154-155 Answer key : -SS the exercise in pairs a.What was invented by W.L.Judson in 1893 ? b.What was brought into Vietnam by Phung Khac Khoan -Feedback (orally) ? When was maize brought into Vietnam ? c.Who was the fountain pen invented by ? d.Where was the ballpoint pen invented ? 10’ e.In which machine is xerography widely used ? III ) Sequence markers : -T sets the scene (Từ nối liên tiếp ) -What pictures / P.155 describe ? -T runs through vocabulary ->Harvesting the crop -SS write the passage in groups *Những tranh miêu tả bước thu hoạch lúa Việt Nam theo phương thức cổ truyền Các em dùng -Feedback từ liên tiếp : first, then, next, after this, finally để miêu tả quy trình thu hoạch lúa / P.155 Answer key : -SS put the posters on the board -T corrects First, the rice is harvested Then the rice plants are threshed Next, the rice grains are husked in the mill to produce brown rice After this, the bran is removed in the mortar and finally it is winnowed to produce white rice IV) Production : -SS the exercise in groups Change these sentences into passive voice : 1.They must dry the beans in the sun -SS go to the board to write ->The beans must be dried in the sun 2.The foreman is showing the students around the -T corrects factory ->The student are being showed around the factory by the foreman 3.A chinese official made paper from woood pulp in the year 105 ->Paper was made from wood pulp by a Chinese official in the year 105 4.We haven’t finished our homework yet ->Our homework hasn’t been finished yet 5.They will hold the next meeting in Chicago 2’ ->The next meeting will be held in Chicago V )Homework : -T says and writes “Homework” -Learn Unit 1-16 on C.B -Prepare “Examination” -SS copy Tuần 35 : Period 103 : Ôn Tập Thi Học Kì II • Objectives : By the end of the lesson, students will be able to use Grammar and vocabulary • Materials : Posters • Procedure Timin g 5’ Contents Teacher’s and students’activities -T divides the class into I )Warmer : two groups -Network -SS go to C.B to write.(one Groupwork student-one form) Structures -In two minutes, the group write more correct forms are winners (38’) II)Exercise : 20’ A) Chọn từ thích hợp điền vào chỗ trống (thay -T reviews the forms of đổi hình thức cần thiết) the structures walk go(2) be make turn have live move work like 1/ You shouldn’t drink so much coffee It good for you / The earth around the sun 3/ We _ dinner one hour ago 4/ My mother in that library for twenty years but she retired last year 5/ Would you mind if I on the television ? / We in MyThoi Park when it rained -SS the exercise in 7/ He asked me if I Pop music groups / Finally , we decided to the concert 9/ The first hamburgers by Louis Lassen in 1985 10/ They _ in HaNoi capital since March 11 / They to NewYork in 1997 Answer key : 1.isn’t 2.goes 3.had 4.worked 5.turned 6.were walking 7.liked 8.to go 9.were made 10.have lived 11.moved B) Chọn từ thích hợp điền vào chỗ trống (thay đổi hình thức cần thiết) in order to (to / so as to) for/since -SS go to the board to easy/ difficult 18’ 12/ find close work go(2) play except It’s very difficult accommodation 13/ long at “ to busy school write cheap time late, Lan” 14 / My trip took me I expected 15/ There are flights daily to HaNoi city -T gives feedback _ Sunday 16/ Hoa’s studying hard pass the graduation examination 17/ It’s too cold outside Would you mind the window ? 18/ He said (that) he for a car company 19/ Do you know where Nam _ ? – No , he didn’t say 20/ I don’t know how _ the video games 21/ We have learned how to drive a car five months 22/ The examination was quite we expected Answer key : 12.to find 14.longer than 17.closing 20.to play 15.except 18.worked 21.for 13.don’t go 16.in order to 19.went 22.easier than 2’ V )Homework : -T says and writes -Learn these structures “Homework” on C.B -Prepare “Exercises” -SS copy Period 104 : Ôn Tập Thi Học Kì II • Objectives : By the end of the lesson, students will be able to pronounce some words and write complete sentences from cue words • Materials : Posters • Procedure Timin Contents g 5’ Teacher’s and students’activities -T divides the class I )Warmer : -Network .Groupwork into two groups -SS go to C.B to write.(one Structures student- one form) -In two minutes, the group write more correct forms are winners (36’) 26’ II)Exercise : A)Dựa vào từ gợi ý sau đây, viết thành -SS write câu hồn chỉnh : individually 1.Nam / handsome / than / brother ->Nam is more handsome than his brother 2.classmate / Hung / good / learn / chinese -SS compare with ->My classmate, Hung, is good at learning chinese 3.She / the / short / Earth ->She is the shortest woman in the world 4.Nam / keen / soccer/ but / brother / interested / their partners -SS go to the board to write volleyball ->Nam is keen on soccer but his brother is interested in volleyball 5.No one / beautifull / woman / country ->No one is more beautiful than this woman in this country 6.Seven days ago / My grandfather / take me / DamSen / HoChiMinh city -T corrects ->Seven years ago, my grandfather took me to DamSen in HCM city She / happy / get / marks ->She is happy to get good marks 8.All / students / class / fond / study / Math ->All of the students in my class are fond of studying math 9.He / bad / sports ->He is very bad at sports 10 We / the / good / students / school ->We are the best students in our school B)Pronunciation (phát âm) 10’ seat heritage interesting machine character agency apartment cottage luggage cage accommodation ago excuse pronunciation instead restaurant 4’ -T gets SS to festival paper great orphanage cupboard seaside beach holiday pronounce the words -T reads the words V )Homework : -SS listen -T says and writes -Learn Unit -16 “Homework” -Prepare “Examination” C.B -SS copy Period 105 : Thi Kiểm Tra on [...]... hỏi cho phần thông tin gạch chân Trước tiên các 8 em đọc các câu xem phần gạch chân đề cập đến thông tin nào ?  The zipper maize ->what ?  In the 16th century, in 188 4 ->when ?  By Lewis Waterman ->who ?  In Hungary ->where ?  In copying machines ->which ? 3 / P.154-155 Answer key : -SS do the exercise in pairs a.What was invented by W.L.Judson in 189 3 ? b.What was brought into Vietnam by Phung... giả 5.mortar e.hạt gạo 6.winnow f.Kỹ thuật sao chép không dùng mực ướt 7.rice grain g.sảy thóc, quạt trấu 8. xerography h.cám (husk : xay, bóc võ / mill : cối xay, nhà máy xay / ballpoint pen : bút bi, bút nguyên tử / thresh : đập) Answer key : 1b 2c 3a 4h 5d 6g 7e 8f Ex : Miss Lien wrote the letter 8 ->The letter was written by Miss Lien S+V+O -T gives an example -T reviews the form -T explains S + be... rained -SS do the exercise in 7/ He asked me if I Pop music groups 8 / Finally , we decided to the concert 9/ The first hamburgers by Louis Lassen in 1 985 10/ They _ in HaNoi capital since March 11 / They to NewYork in 1997 Answer key : 1.isn’t 2.goes 3.had 4.worked 5.turned 6.were walking 7.liked 8. to go 9.were made 10.have lived 11.moved B) Chọn từ thích hợp điền vào chỗ... write.(one Passive forms student-one form) -Or Grids ( 28 ) Draw Win Run Sell Bring II )Passive forms : 5’ Drew Won Ran Sold Brought drawn Won Run Sold Brought 2.com.Ltd 3.due to more correct forms are winners -SS match the words (phrases) with -Matching /.Groupwork 1.run a business -In two minutes, the group write their meanings a.bởi vì b.quản lý, điều hành 1 doanh nghiệp -T gives feedback c.công ty trách nhiệm... mistakes on C.B 2’ V )Homework : -T and SS correct -T says and writes “Homework” -Learn vocabulary on C.B -Rewrite the process completely -Prepare “Language Focus” / P 154-155 -SS copy Period 102 : Unit 16 - INVENTIONS – Lesson 5 – Language Focus - Page 154-155 • Objectives : By the end of the lesson, students will be able to use Passive Forms and Sequence Markers • Materials : Posters, Magnified copies... easy/ difficult 18 12/ find close work go(2) play except It’s very difficult accommodation 13/ long at “ to busy school write cheap time late, Lan” 14 / My trip took me I expected 15/ There are flights daily to HaNoi city -T gives feedback _ Sunday 16/ Hoa’s studying hard pass the graduation examination 17/ It’s too cold outside Would you mind the window ? 18/ He said (that)... students’activities -T divides the class into I )Warmer : two groups -Network -SS go to C.B to write.(one Groupwork student-one form) Structures -In two minutes, the group write more correct forms are winners ( 38 ) II)Exercise : 20’ A) Chọn từ thích hợp điền vào chỗ trống (thay -T reviews the forms of đổi hình thức nếu cần thiết) the structures walk go(2) be make turn have live move work like 1/ You shouldn’t... III ) Sequence markers : -T sets the scene (Từ nối chỉ sự liên tiếp ) -What do pictures / P.155 describe ? -T runs through vocabulary ->Harvesting the crop -SS write the passage in groups *Những bức tranh miêu tả các bước thu hoạch lúa ở Việt Nam theo phương thức cổ truyền Các em hãy dùng -Feedback những từ chỉ sự liên tiếp như : first, then, next, after this, finally để miêu tả quy trình thu hoạch... finished our homework yet ->Our homework hasn’t been finished yet 5.They will hold the next meeting in Chicago 2’ ->The next meeting will be held in Chicago V )Homework : -T says and writes “Homework” -Learn Unit 1-16 on C.B -Prepare “Examination” -SS copy Tuần 35 : Period 103 : Ôn Tập Thi Học Kì II • Objectives : By the end of the lesson, students will be able to use Grammar and vocabulary • Materials :... how _ the video games 21/ We have learned how to drive a car five months 22/ The examination was quite we expected Answer key : 12.to find 14.longer than 17.closing 20.to play 15.except 18. worked 21.for 13.don’t go 16.in order to 19.went 22.easier than 2’ V )Homework : -T says and writes -Learn these structures “Homework” on C.B -Prepare “Exercises” -SS copy Period 104 : Ôn Tập Thi Học